Fig. 1. Adjustable LED light source culture frame 1: Central air conditioning and fresh air system: increase air flow, control indoor temperature; 2: Air chamber; 3: Humidification pipeline: humid air is thoroughly mixed in the air chamber and sent to the various layers of the cultivation rack by the fresh air system; 4: Shutter: filter; 5: Light tube; 6: Cultivation rack placement layer; 7: Light intensity adjuster; 8: Power supply; 9: Microcomputer automatic time switch